GermGuardian Air Purifier Replacement Filter B, FLT4825, HEPA Pure, AC4820, AC4825
GermGuardian Air Purifier Replacement Filter B, FLT4825, HEPA Pure, AC4820, AC4825
Hero image 0 of GermGuardian Air Purifier Replacement Filter B, FLT4825, HEPA Pure, AC4820, AC4825, 0 of 6
Overall pick

GermGuardian Air Purifier Replacement Filter B, FLT4825, HEPA Pure, AC4820, AC4825

Key item features

  • GENUINE HEPA PURE™ FILTRATION – Experience the power of authentic HEPA PURE™ air filtration. Genuine GermGuardian high efficiency FLT4825 HEPA air filters capture 99.97% of dust, allergens, and wildfire smoke particles down to 0.1 microns from the air. With a massive 9.0 sq. ft. of filter area and over 140 pleats, our genuine filters effectively trap pollen, harmful bacteria, and pet dander from the air.
  • WHY HEPA PURE™ - Proudly manufactured in North America, FLT4825 HEPA PURE™ stands out with its unmatched multi-layer filtration technology. Backed by rigorous scientific testing using reputable and independent labs, we combine extensive research, superior materials, and meticulous engineering to outperform the competition. Beware of knockoffs that compromise on quality and craftsmanship, leaving harmful pollutants in the air. Genuine HEPA PURE™ filters increase longevity with fewer replacements while delivering an air of confidence in a safer, cleaner, and more breathable environment.
  • PURE PARTS, PURER AIR - Genuine GermGuardian replacement filters guarantee certified fit and maximum filtration. Off-brand filters frequently fail HEPA testing standards, fit incorrectly, reduce efficacy, and may cause damage to your GermGuardian air purifier. Your purifier is only as powerful and effective as the filter you put inside.
  • REDUCES ODORS - The activated carbon pre-filter traps dust, pet hair, and other large particles, while extending the life of the HEPA filter. Treated carbon absorbs volatile organic compounds from the air and reduces odors from smoking, cooking and pets. The FLT22CB4 carbon pre-filters can be replaced every 2-3 months to help reduce common household odors and extend filter life.
Current price is $19.88
Price when purchased online
  • Free 90-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $19.88
One-time purchase $19.88

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Today
.
Order within 8 hr 40 min
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
Other sellers
$18.84
+Free shipping
Shipping, arrives by Sat, May 23 to Columbus, 43215
Sold and shipped by GemStateOutfitters
Free 30-day returns
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.

About this item

Product details

Specifications

Warranty

Warnings

Customer ratings & reviews

4.7 out of 5 stars
stars1,948 ratings1,575 reviews
How item rating is calculated

Reviews summary

Pros

  • : Filter replacements can be set up quickly.
  • : Provides improved air circulation and purification.
  • : Captures high amounts of dust and pet hair.
  • : Filter fits snugly into designated space.
  • : Filters are affordably priced compared to similar products.
Generated by AI

Customer photos

Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 1,575 reviews

Feb 5, 2026
Shannon
Item details
Size: 15.77x1.29x4.76
5 out of 5 stars review

Verified Purchase

Amazing filter for the Germ Guardian.....

I have a tall upright model of the Germ Guardian. This filter works awesome! It lasts a long time. I use my Germ Guardian in my classroom, and it helps in purifying air, removing allergens, bacteria, and general airborne germs in the classroom. I run the Germ Guardian all day long, and this is the first filter I have purchased for the unit.

Helpful?3US58RSQQO6U19865569
Oct 31, 2025
William C.
5 out of 5 stars review

Seller Verified Purchase

Satisfied customer

Needed to buy two more filters for our air filtation machine. Ordering was very easy, and the filters arrived promptly, and in good shape. We have them in reserve for when the current filter expires. We like our filtration machine, living here in Montana where we are now getting quite a bit of smoke from wildfires in the late Summer and early Fall.

Review from Guardian Technologies
Helpful?3US58RSQQO6U19865569
Mar 4, 2026
Suellen
Top Reviewer
Item details
Size: HEPA Pure
5 out of 5 stars review

Verified Purchase

Amazing

I bought 3 used Germ Guardian air purifiers off facebook marketplace about 8 years ago and they run 24/7/365. One gave up about 2 years ago but I have still been using the other 2. I've been washing and vacuuming them but finally had the money to replace the filters. I put them both in and within 5 minutes the house started to smell 100% better! I'll be so much better about replacing the filters now and when these 2 go out I'll replace them with newer models of the same one. I can't even say enough good things about them and how much better my house smells. (Three dogs and 17 cats over the last 10 years!)

Helpful?3US58RSQQO6U19865569